Comprehensive Description

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General Description

This group of Dysstroma, consisting of D. truncata, suspectata, walkerata, and citrata, form a complex of species which are often difficult to distinguish without resorting to examining the genitalic characters. Forewing colouration is variable. Most similar to and difficult to distinguish from D, citrata; D. truncata flies earlier, and has a brighter, more contrasting orange-brown subapical patch, and the brown AM band usually appears as a more well-defined semi-circle at the anal margin - in citrata, this semi-circle is not apparent as the band is more continuous. The North American subspecies is transversata (Kellicott). McDunnough (1946) illustrates the male and female genitalia. 


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© University of Alberta Museums

Source: University of Alberta Museums

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